20 Frequently Asked Questions about SQL

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20 Frequently Asked Questions about SQL

The internet plays a significant role in our lives today. Yet numerous terms found on the world wide web are still unknown to many of us. ‘SQL’ is one such term that you might see pop up quite often these days.

If you recall, you are almost always prompted to create an account whenever you install an application on your mobile or computer. Applications and websites save this information with the help of SQL.

Curious to know more? Here are some FAQs about SQL that’ll improve your knowledge.

1What is SQL?

SQL is a computer language that gives instructions to the database of an app or website. The language helps store data and makes changes to it when required. Almost all relational database management systems use SQL as a database language. For instance, when you create an account on Gmail, SQL stores all your information in a database. It later retrieves this information whenever you sign in from a PC or mobile device. 

2Who offers SQL services? 

Data scientists and data engineers are the people who work with computer languages like SQL. They provide SQL server consultancy to clients that deal with large quantities of data daily.

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3What are the applications and uses of SQL?

SQL is primarily used to create, structure, and organize a database. It can also modify any existing information you previously entered in a database. One of SQL’s main applications includes creating, updating, and deleting rows and columns of data. Additionally, SQL is also used to set and run analytical queries

4Is SQL a programming Language? 

No, it isn’t. It is, as the name suggests, a query language. 

5Who gets to learn SQL? 

Well, anybody can learn SQL. But generally speaking, data scientists, data engineers, data analysts, and anybody who deals with data to make decisions can learn and practice SQL. Marketing professionals and political analysts use SQL today to make critical decisions about global trends.

6Is it hard to learn the language? 

No. SQL is not a programming language and is therefore relatively easy to learn. 

7Do you have to be a computer scientist to learn and use SQL? 

You might have some advantage if you have a computer-related background. However, it is not necessary to be a data scientist or analyst to learn SQL. The language is simple and user-friendly, and knowledge is power!

8Why is SQL so popular? 

Because it has easy and standard commands and protocols across its different versions. 

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9Are there many variations of SQL? 

Yes! The most common ones are MySQL, SQL Server, SQLite, PostgreSQL, Mongo, D, B, and Oracle. 

10 Does SQL work with structured or unstructured data? 

SQL is compatible with structured data only. This includes easy to gather information such as house numbers, postal codes, streets, cities, and countries. 

11What are the benefits of using SQL?

SQL makes retrieving large amounts of data from databases very efficient. Almost every relational database management system supports SQL. Since the coding is relatively easy, SQL is user-friendly and easy-to-understand as well. 

12What are the different subsets of SQL? 

SQL has three main subsets. Data Definition Language (DDL) helps perform various operations on a database such as CREATE, ALTER, and DELETE values. Data Manipulation Language (DDL) allows you to manipulate data with commands such as INSERT, UPDATE, DELETE, and RETRIEVE. Data Control Language (DCL) helps you to give permissions to people using the database. 

13Does SQL work with a relational database or with a non-relational database? 

SQL can work effectively with both database forms. MySQL works with relational databases, and MongoDB works with Non-relational databases. 

14What are relational and non-relational databases? 

A relational database stores data in tables – the table being a form of a relation between the number values in a dataset. A non-relational database stores data in a non-tabular form and is ideal for storing data that frequently changes. 

15 Why is there a need to learn SQL? 

As organizations gather more and more data, there is a growing demand to store it and make sense of it. SQL helps people learn how to store, manipulate, and analyze large quantities of data to make better decisions. Some of these decisions can profoundly impact numerous national and international matters that influence people’s lives.

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16From where Can I Learn SQL? 

You can always start by learning the basics of SQL by watching tutorials for beginners on Youtube. But If you want the real deal, consider registering for a course online from a reputed source. Do take a detailed look at the contents of the program and see if it meets your requirements. 

17Why are there different types of SQL?

 There are different vendors for SQL servers, but the language remains the same across all servers. It is the Implementation of the language that is different, not the language itself. Vendors keep adding new features to their servers to differentiate themselves from competitors. 

18What is the difference between SQL and MySQL?

SQL is a standard language. On the other hand, MySQL is a relational database management system like SQLite and MongoDB.

19What professions require proficiency with SQL? 

Any profession that requires large quantities of data to be managed on a routine basis. This includes actuaries, accountants, marketers, financial analysts, and political analysts. 

20Has it become mandatory to learn SQL? 

If you are part of any of the professions mentioned above, you SHOULD learn SQL. If you do not need it now, you will need it in the future because the world is going to be more data-savvy tomorrow.

Conclusion 

Today, many global and life-saving decisions are being made by analyzing large quantities of data from numerous sources. Managing large amounts of data is a lot easier today than it was before. Do you want to make better decisions that lead to better results? Learn SQL to become better at managing data, analyzing data and, making effective decisions.

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